Add error message for CollectionHandle init (PolymerLabs#6690)

Add error message for CollectionHandle init Closes PolymerLabs#6690 COPYBARA_INTEGRATE_REVIEW=PolymerLabs#6690 from SHeimlich:collectionHandle dd7e309 PiperOrigin-RevId: 346455417
sjmiles · Dec 10, 2020 · 408388c · 408388c
1 parent f1092db
commit 408388c
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/java/arcs/core/entity/CollectionHandle.kt b/java/arcs/core/entity/CollectionHandle.kt
@@ -45,7 +45,9 @@ class CollectionHandle<T : Storable, R : Referencable>(
   private val storageAdapter = config.storageAdapter
 
   init {
-    check(spec.containerType == HandleContainerType.Collection)
+    check(spec.containerType == HandleContainerType.Collection) {
+      "Collection containerType required for CollectionHandle $name, but got ${spec.containerType}."
+    }
   }
 
   // Filter out expired models.